In 2001, Kramer was an organizer with the Service Employees International Union District 1199 WV/KY/OH, and a member of the Young Democratic Socialists, the DSA youth section. 
2001 DSA leadership
Nineteen people ran for the sixteen National Political Committee positions elected at the 2001 Democratic Socialists of America Convention. The winners were:
- Theresa Alt, Ithaca
- Susan Chacin, Berkeley
- Eric Ebel, Ann Arbor
- Virginia Franco, San Diego
- David Green, Detroit
- Gabe Kramer, Columbus
- Selina Musuta, Ithaca
- Gina Neff, New York City
- Angel Picon, Stockton
- Maria Pineda, Davis
- Kathy Quinn, Philadelphia
- Jason Schulman, New York City
- Joseph Schwartz, Ithaca
- Timothy Sears, Oakland
- Jessica Shearer, New York City
- Herb Shore, San Diego
The Young Democratic Socialists representatives to the NPC (sharing the one Youth Section vote) were Joan Axthelm (Chicago) and Fabricio Rodriguez (Arizona).
Democratic Socialists of America Unity
Gabe Kramer Pennsylvania, supported the Democratic Socialists of America Unity grouping, established for the 2017 Democratic Socialists of America National Convention in Chicago.
DSA Sewer Socialist Caucus Closed FB group
Members of the DSA Sewer Socialist Caucus, closed Facebook group, as of September 15, 2017, included Gabe Kramer
Democratic Socialists Swag Swap
Members of Democratic Socialists of America's Democratic Socialists Swag Swap closed Facebook group, accessed November 9, 2017 include Gabe Kramer .
Socialist Majority Caucus
DSA's Socialist Majority Caucus signatories list as of April 25 2019 included Gabe Kramer of Pittsburgh Democratic Socialists of America.