Use the Gramps Preferences Third party addons management to install the 2.0.33 Form Gramplet update.
Here is Gramps XML tree that can be imported. It has a Source with 1950 Census, 1 placeholder person (John Smith) with 1 Citation. The source has URLs to three online locations of the census archives.
You can paste the following XML into the Import Text gramplet and click the Import button.
Alternately, paste the following into a text file named 1950Census.gramps and import it.
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE database PUBLIC "-//Gramps//DTD Gramps XML 1.7.1//EN"
"http://gramps-project.org/xml/1.7.1/grampsxml.dtd">
<database xmlns="http://gramps-project.org/xml/1.7.1/">
<header>
<created date="2022-05-11" version="AIO64-5.1.5-1"/>
<researcher>
<resname>The Gramps Project</resname>
<resaddr>https://gramps.discourse.group/</resaddr>
</researcher>
</header>
<events>
<event handle="_f071e8dcfda7b117ffdff768b86" change="1652325215" id="E0000000">
<type>Census</type>
<dateval val="1950-04-01"/>
<citationref hlink="_f071e8dd0ac18b4178dd364135e"/>
</event>
</events>
<people>
<person handle="_f071e73131f388699c6eef5e2fc" change="1652325215" id="I0000000">
<gender>M</gender>
<name type="Birth Name">
<first>John</first>
<surname>Smith</surname>
</name>
<eventref hlink="_f071e8dcfda7b117ffdff768b86" role="Primary">
<attribute priv="1" type="Order" value="1">
<citationref hlink="_f071e8dd0ac18b4178dd364135e"/>
</attribute>
<attribute type="Name" value="Smith, John">
<citationref hlink="_f071e8dd0ac18b4178dd364135e"/>
</attribute>
<attribute type="Farm?" value="Yes">
<citationref hlink="_f071e8dd0ac18b4178dd364135e"/>
</attribute>
<attribute type="On 3+ acres of land?" value="Yes">
<citationref hlink="_f071e8dd0ac18b4178dd364135e"/>
</attribute>
<attribute type="Relationship" value="Self">
<citationref hlink="_f071e8dd0ac18b4178dd364135e"/>
</attribute>
<attribute type="Race" value="W">
<citationref hlink="_f071e8dd0ac18b4178dd364135e"/>
</attribute>
<attribute type="Sex" value="M">
<citationref hlink="_f071e8dd0ac18b4178dd364135e"/>
</attribute>
<attribute type="Age at last birthday" value="25">
<citationref hlink="_f071e8dd0ac18b4178dd364135e"/>
</attribute>
<attribute type="Marital status" value="M">
<citationref hlink="_f071e8dd0ac18b4178dd364135e"/>
</attribute>
<attribute type="Place of birth" value="Pennsylvania">
<citationref hlink="_f071e8dd0ac18b4178dd364135e"/>
</attribute>
<attribute type="Is he naturalized?" value="No">
<citationref hlink="_f071e8dd0ac18b4178dd364135e"/>
</attribute>
<attribute type="housework (H), work (W), unable to work (U) or other (Ot)" value="W">
<citationref hlink="_f071e8dd0ac18b4178dd364135e"/>
</attribute>
<attribute type="Worked last week? (Y/N)" value="Y">
<citationref hlink="_f071e8dd0ac18b4178dd364135e"/>
</attribute>
<attribute type="Looking for work?" value="N">
<citationref hlink="_f071e8dd0ac18b4178dd364135e"/>
</attribute>
<attribute type="Has a job or business?" value="Y">
<citationref hlink="_f071e8dd0ac18b4178dd364135e"/>
</attribute>
<attribute type="# hours worked last week" value="80">
<citationref hlink="_f071e8dd0ac18b4178dd364135e"/>
</attribute>
<attribute type="Type of work" value="Farmer">
<citationref hlink="_f071e8dd0ac18b4178dd364135e"/>
</attribute>
<attribute type="Business or industry" value="Ag">
<citationref hlink="_f071e8dd0ac18b4178dd364135e"/>
</attribute>
<attribute type="Same house in Apr 1949?" value="Y">
<citationref hlink="_f071e8dd0ac18b4178dd364135e"/>
</attribute>
<attribute type="Farm in Apr 1949?" value="Y">
<citationref hlink="_f071e8dd0ac18b4178dd364135e"/>
</attribute>
<attribute type="Same county in Apr 1949?" value="Y">
<citationref hlink="_f071e8dd0ac18b4178dd364135e"/>
</attribute>
<attribute type="State or foreign country" value="PA">
<citationref hlink="_f071e8dd0ac18b4178dd364135e"/>
</attribute>
<attribute type="Place of birth of father" value="PA">
<citationref hlink="_f071e8dd0ac18b4178dd364135e"/>
</attribute>
<attribute type="Place of birth of mother" value="PA">
<citationref hlink="_f071e8dd0ac18b4178dd364135e"/>
</attribute>
<attribute type="Highest grade attended" value="8">
<citationref hlink="_f071e8dd0ac18b4178dd364135e"/>
</attribute>
<attribute type="Completed?" value="Y">
<citationref hlink="_f071e8dd0ac18b4178dd364135e"/>
</attribute>
<attribute type="Attended school since Feb 1, 1950?" value="N">
<citationref hlink="_f071e8dd0ac18b4178dd364135e"/>
</attribute>
<attribute type="How many weeks has he been looking for work?" value="0">
<citationref hlink="_f071e8dd0ac18b4178dd364135e"/>
</attribute>
<attribute type="# weeks worked in 1949" value="52">
<citationref hlink="_f071e8dd0ac18b4178dd364135e"/>
</attribute>
<attribute type="Amount of wages/salary in 1949" value="10000">
<citationref hlink="_f071e8dd0ac18b4178dd364135e"/>
</attribute>
</eventref>
</person>
</people>
<citations>
<citation handle="_f071e8dd0ac18b4178dd364135e" change="1652325215" id="C000000">
<dateval val="1950-04-01"/>
<confidence>2</confidence>
<sourceref hlink="_f071e68ef6c70d0e673a3acc15e"/>
</citation>
</citations>
<sources>
<source handle="_f071e68ef6c70d0e673a3acc15e" change="1652327380" id="S000000">
<stitle>1950 US Census</stitle>
<sauthor>Bureau of the Census (United States Census Bureau - USCB)</sauthor>
<spubinfo>Form P1, 1950 Census of Population and Housing</spubinfo>
<noteref hlink="_f071fbd8f595e333d1d12ee1302"/>
<srcattribute type="Form" value="US1950"/>
</source>
</sources>
<notes>
<note handle="_f071fbd8f595e333d1d12ee1302" change="1652327170" id="N000000" priv="1" type="Source Note">
<text>Joel Weintraub 1950 US Census for Genealogists Facebook Public group 1.3K members
Let me offer an alternate way of viewing the ED (Enumeration District) images. We have a "Universal 1950 Census Image Viewer" at the One-Step site, https://stevemorse (dot) org/census/viewer1950.html You choose your ED #, and then can pick between the NARA Viewer, FamilySearch Viewer, or Ancestry Viewer.
Ancestry
https://www.ancestry.com/search/collections/62308/
Family Search
https://www.familysearch.org/1950census/
National Archives
https://1950census.archives.gov/search/
</text>
<style name="bold">
<range start="0" end="15"/>
<range start="81" end="83"/>
</style>
<style name="italic">
<range start="15" end="46"/>
</style>
<style name="link" value="https://1950census.archives.gov/search/">
<range start="528" end="567"/>
</style>
<style name="link" value="https://stevemorse.org/census/viewer1950.html">
<range start="231" end="282"/>
</style>
<style name="link" value="https://www.ancestry.com/search/collections/62308/">
<range start="401" end="451"/>
</style>
<style name="link" value="https://www.facebook.com/groups/634847774579022/">
<range start="15" end="46"/>
</style>
<style name="link" value="https://www.familysearch.org/1950census/">
<range start="467" end="507"/>
</style>
</note>
</notes>
</database>