Based on the sequence , this appears to be a list of weapon or game item IDs , likely from a first-person shooter (e.g., Counter-Strike 1.6 / Source / CS:GO / CS2 or a modded version like Zombie Escape ).
A build thread for a might include:
If you had something else in mind or a different context for "gsm ls1 ak ls2 ls3," please provide more details! gsm ls1 ak ls2 ls3