Question

In Gvim, the command for paste in the menu is "+gP

My understanding is that " indicates I’ll be pasting from a specific register, + indicates the register (some sort of global shared register? the clipboard?), and P is the paste command.

However, this leaves the g unexplained. What does it do?

Answer 1

See :help gP:

Just like “P”, but leave the cursor just after the new text. {not in Vi}