The property GMap2.Bounds is currently in a TODO state.
Is there anyone that have an idéa of how to get the bounds? Using Google API is one solution but that would cause extra round trips and could also mess up the server side code when initalizing the map. I think the best idéa would to calculate the bounds on the server.
I've been considering this - indeed, the round trips would add extra problems, in my opinion they would be a nightmare to implement.
You can look at this and see Google's own code for calculating the bounds. DO NOT copy and paste directly - there are copyright issues. (and anyway I don't particularly want obfuscated code anywhere near the GMap.Net Control, so at the very least change the names to something sensible!)
P.S. I started the reverse engineering with Google Map version 2.67. 2.68 has been released since, and there may be some changes (MarkerManager for a start)