The council's Community Learning Development (CLD) Youth Services team is the first local authority service of its kind in Scotland to achieve the top award.
Deans Community High School in Livingston became the second West Lothian school to achieve the Silver charter award, joining Broxburn Academy which was the first school in Scotland to be awarded the silver status in 2016.
Depute Council Leader Kirsteen Sullivan said: "We are delighted that West Lothian Council's CLD Youth Services team is the first in Scotland to achieve the Gold charter standard.
"It's also fantastic to see Deans Community High School become our second Silver charter recipient after Broxburn which was the first in Scotland.
"We are committed to actively promoting diversity, equality, inclusion and LGBT rights in West Lothian by mainstreaming the agenda into everything that we do as a council, as well as work with our partners to achieve this goal.
"West Lothian Council is already a Stonewall Diversity Champion and is committed to advancing LGBT equality through events such West Lothian Pride, which is now in its fifth year and is going from strength to strength."
Working towards the LGBT charter has included proactively involving LGBT people in every aspect of work, protecting staff and providing a high quality service.
Invited guests were treated to presentations by pupils from Deans' DNA (Definitions Not Applicable) group and the Glitter Cannons LGBT youth group on the actions taken to improve diversity and inclusion at Deans and across West Lothian.
Fergus MacMillan, Chief Executive of LGBT Youth Scotland, who presented both Deans and CLD Youth Services with their awards, added: "We are delighted to present the Gold LGBT Charter to West Lothian Council CLD youth services.
"Working to make services more inclusive of transgender people and reaching out directly to the LGBT community in West Lothian are important parts of what this award recognises.
"Well done to everyone from the CLD team and young people from Glitter Cannons on this fantastic achievement, from everyone at LGBT Youth Scotland.
"Congratulations also go to pupils, teachers and parents at Deans Community High School on achieving their Silver LGBT Schools Charter award."
Both Bathgate Academy and West Lothian Women's Aid were also awarded the Bronze charter in 2018, with West Lothian College and West Calder High School currently working towards applying for chartered status.