Let's have a little common sense when dealing with rumors.
1) No team has seen Gurley practice.
2) There opinions would be based upon the preseason.
3) Gurley does not "know" the other team's offense. How much would he pick up in the last couple of weeks and help that team?
4) With 80% of the season complete there is plenty of film on the Packers so a team is unlikely to sign a player to get a playbook for the playoffs. Coaches have spent many hours studying every gesture of Rodgers for clues.
5)
Is the source of the rumor Gurley's agent? Agents are salesmen. Many downplay the abilities of players signed with other agents and overstate their own client's status.
In this twitter bad rumor/gossip age, let's be careful before accepting everything you hear is true and from a reliable source. Especially in February and March when agents are trying to find their clients jobs.
Even in the 21st century bad rumors are bad journalism.