Definitely! Here are a bunch I like. From what I remember, Lestrade is either the main character or one of the main characters in all of these. Enjoy!
The Breeze Deep on the Inside—“When Molly and DI Lestrade share a drink at a pub, a part of her wonders why he’s talking to her. The rest of her doesn’t care.”
Threshold—“It didn’t occur to Lestrade, not until the moor, that maybe there was a reason why he had kept wearing that ring.”
Bromance Isn’t Dead—“John and Lestrade are epic bros.”
Ripple Effect—“Sherlock and John are finally tying the knot. Greg and Mycroft both need some time to process their feelings. Fortunately, they end up sorting each other out.”
The Long Drive—“Sherlock, John, and Lestrade on a road trip together, stuck in the same car for hours.”
Impact—“Impact: The action of one object coming forcibly into contact with another.”
Untitled fill—“Prompt: Lestrade bursting into the flat, only to find Sherlock sprawled out post-shag. Flies undone, shirt unbuttoned but still on, and truly epic sex hair.”
I Hear You In My Heart (You Carry Me Always)—“Lestrade can’t help but hear their song beating quieter and quieter.”
Winter’s Child Series—“Sherlock and John grow closer in the years after the series, and eventually start a family.”
Nanny John ‘Verse—“Stories in the AU where John is Sherlock and Mycroft’s nanny.”
Obvious; or, Greg Lestrade Is Good at Detecting and Has Five Pounds to One That Sherlock and John Will Shag—”Lestrade isn’t the reasoning machine Sherlock is, but that doesn’t mean he’s blind. And it’s obvious to him, if nobody else, that a certain dynamic duo could use a nudge in the right direction.”
Hold On Hope—“Dating John comes with a Sherlock-shaped caveat.”
Untitled Fill—“Prompt: I want to read fic where Lestrade is divorced, shares a child with his ex-wife and has Mycroft as a lover. And awww, maybe the kid calls him Uncle Mycroft?”
An Avalanche of Detour Signs—“In which Molly Hooper gets a job, gets a degree, breaks a heart, has her heart broken, falls in love, keeps a secret, saves a life, runs a morgue, falls apart, pulls it together, and finds exactly what she didn’t know she was looking for—not necessarily in that order.”