Last Friday's (March 2) episode of the BBC show saw Michael Moon (Steve John Shepherd) surprise partner Janine Butcher (Charlie Brooks) by proposing to her at the venue.
The Gherkin's events team has now reported that booking enquiries soared by 500% over the weekend following the exposure on EastEnders, according to Event Magazine.
Meanwhile, there were 10,000 additional visits to the Gherkin's website as the episode went out.
Spokesperson Joel Claudstre commented: "There were almost ten times more visits to the private hire section of the Gherkin's website than on our previous record day, and we fielded queries from as far afield as Canada, with several of these looking certain to become bookings."
Janine accepted Michael's proposal in the episode and the couple have now shared their happy news with Albert Square's residents.
However, the pair's long-term future remains uncertain as fans know that Janine will be taking a six-month break from Walford later this year.
> EastEnders' Charlie Brooks explains soap break
> Read more EastEnders news and spoilers
Watch Michael Moon's EastEnders character trail in the video below: