Let Gmap center on the users geolocation, but still load all the node markers onto the map
I can clarify after my comment on your question is addressed but if I had to guess I would say you are using an nid contextual filter to center the map?

If so, that is why you aren't getting other nodes.

Alternatives are:


Add the Global: Null contextual filter and pass the nid through that. The null contextual filter will not affect results at all.
Keep using the nid contextual filter, but check the "Exclude" checkbox in the "More" fieldset of the filter. This will mean all nodes except the given nid will be displayed, but the given nid can still be used to center the map.


Use whichever method gives you the functionality you want.