• gos,
• gf,
• ogs,
• gr,
• pgs,
• ags,
• dgs,
• gsm,
• gl,
• gcse,
• gh,
• gv,
• xs,
• gvsu,
• mgs,
• ugs,
• ls,
• fs,
• gis,
• js

• z's,
• p's,
• U.S.,
• f's,
• GSA,
• d's,
• O's,
• G,
• Ms.,
• ga.,
• h's,
• c's,
• as,
• gas,
• S,
• k's,
• e's,
• u's,
• ms,
• w's,
• us,
• go,
• q's,
• P.S.,
• s's,
• j's,
• n's,
• M's,
• b's,
• g's,
• -'s,
• ks,
• a's,
• Y's,
• b.s.,
• -s,
• ga,
• x's.

The plural form of the word "GS" is also "GS".

The singular form of the word "GS" is "G"