Gilmour is one of six players from Featherstone but St Helens club Thatto Heath have the biggest representation with nine.
England will face stiff competition from Australia, France and three-time winners New Zealand but coach Chris Chapman, who succeeded Steve McCormack earlier this year, believes his squad has the ability to go all the way.
"I feel the group has a good blend of experience and youth and the skills to succeed if they apply themselves and work hard for each other," he said.
"New Zealand will be confident of retaining their title and Australia will be coming here confident as well but we're on home soil and we'll be going out there to make an impact."
The final will be held at Headingley Carnegie Stadium, Leeds, on Sunday, July 14.
England squad: Lindsay Anfield (Normanton), Dani Bound (Thatto Heath), Katie Cooper-Birkenhead (Featherstone), Jodie Cunningham (Thatto Heath), Andrea Dobson, Kim Field (both Featherstone), Lois Forsell (Bradford), Holly Freestone (Thatto Heath), Natalie Gilmour (Featherstone), Claire Hall (Thatto Heath), Amy Hardcastle (Bradford), Lori Holloran (Normanton), Clare McGinnis (Thatto Heath), Kirsty Moroney (Bradford), Holly Myers (Coventry/Southampton), Emily Rudge (Thatto Heath), Emma Slowe (Featherstone), Lauren Stallwood (Bradford), Tara Stanley (Crossfields), Beth Sutcliffe (Thatto Heath), Danielle Titterington (Featherstone), Rachel Twibill (Bradford), Gemma Walsh, Jenny Welsby (both Thatto Heath).