Command xinfo

xinfo displays all the information known to gef about the specific address given as argument:

Important note : For performance reasons, gef caches certain results. gef will try to automatically refresh its own cache to avoid relying on obsolete information of the debugged process. However, in some dodgy scenario, gef might fail detecting some new events making its cache partially obsolete. If you notice an inconsistency on your memory mapping, you might want to force gef flushing its cache and fetching brand new data, by running the command reset-cache.