The meaning of the Acronym GM is...

GM is

• Get Mechanic
• Generally Meaningless

More Meanings For GM:

• Bitmap graphics (Autologic files)
• Global Minimal
• Group Message
• Good Morning
• Good Message
• Game Maker
• Get Me
• Gutter Mouth
• Good Morning
• Good Message
• Group Message
• Generally Modulated
• A Genetically Made
• General Merit
• Gorgeous Magnificent

GM is also in:

• Chat
• Clothes
• Electronics
• File Extensions
• General
• Mathematics
• Networking
• SMS
• Software
• Universities