A popular motto says 'the most loving thing you can do to anyone is to share the gospel with them'. 

     If to "share" means to "tell", i.e. "declare" - I agree. But "sharing" can also mean, "here, take this" or "I will share with you my lunch, room, clothing, etc". In this latter sense the gospel cannot be "shared". 

     The Bread of Life is given to the spiritually hungry and by the same it is received with joy. It can only be "shared" with someone if they manifest that spiritual hunger. That hunger is made manifest in the response to the declaration of the gospel. IF the person who has heard it, says at the end of it, 'What shall I do to be saved?' then the speaker must say, 'Believe on the Lord Jesus Christ and thou shalt be saved and thy house'. 

     But if the listener says, 'alright that's an interesting (or boring) fairy tale' , then the joy of the gospel cannot be "shared". 

     The gospel is to be declared, set forth, presented, explained. Sometimes, it can be "shared".