Organisers of the annual prizegiving, which honours the best of TV, have planned a memorial segment for the pair, alongside actress Jean Stapleton, comic Jonathan Winters and producer Gary David Goldberg.
Each one will be honoured by a close co-star or former colleague - Glee star Jane Lynch will remember Monteith, The Sopranos' matriarch Edie Falco will speak about Gandolfini, actor/director Rob Reiner will pay tribute to Stapleton, Robin Williams will share his memories of Winters, while Michael J. Fox will talk about the life of Family Ties creator Goldberg.
The tribute will be separate to the show's usual In Memorium section, which honours late stars.
Monteith died following a heroin and alcohol overdose in July, Gandolfini suffered a heart attack during a trip to Italy in June, Stapleton died aged 90 in May, Winters passed away April, and Goldberg lost his battle with brain cancer in June.
Neil Patrick Harris will host the ceremony at the Nokia Theatre in Los Angeles.