I currently have a grand piano on a stage and was wanting to move it 2 (or so) meters back to make more room on the stage for an upcoming concert where it will not be used. I was wondering if I will need to re-tune it when we move it back? It has been tuned annually and last tune was only a couple of months ago
If the stage is smooth and the castors on the piano legs are in reasonable condition, you don't have anything to worry about.
Check which direction the castors are pointing, and start moving the piano in that direction, even if you really want to go at right-angles. The castors will pivot easier when the piano is actually moving (slowly).
I can think of one grand piano that was regularly moved a few meters twice a day, five days a week - and that never "sent it out of tune".
Grand pianos often have rolls underneath anyway. They are not usually screwed to the floor. They are expected to be moved around in concert venues a lot more than standup pianos are. So the frame should be solid enough to support moving. Put at least one suitably strong person to each corner and carry rather than drag it. You might want to lift each leg on a suitable rollboard, one at a time, and then roll it instead of carrying. That way, you can work on one corner at a time.