The server And your GMod might have lag and that is why you came here.
How To Stop Gmod lag
1 go into steam
2 right click on game and click options and go to local files and "very integerity of game cache" or whatever and "defrag cache files"
3 Clean your hard-drive run a virus scan and registry cleanup than defrag your hard-drive
4 remove unused programs (before defrag)
5 close out of EVERYTHING
How to help the server stop lag
1 do not use too many props
2 do not keep welded bases on the map
3 do not PROPSPAM!
4 lets hope the root admins and Pantho CLEAR the server's log file
5 be efficient. sometimes 1 prop can replace many props
These tips are just basic. most of you know them but this small thrown-together guide is for the people who are having some trouble.