There's some chat on Twitter saying that an Eastern route to Gibraltar could be announced imminently. Apparently Eastern are basing an E170 in Gib for Summer 21 with flights to BHX and SOU rumoured. I reckon they'll be announced tomorrow. Gibraltar is now on the airport's website and route map as a destination but with no days of operation showing yet.
Credit to SeanM1997 on twitter for the initial info.