Live in The Netherlands 1976
It's from this album, which has been commercially available for a while. They also did a studio album called "Idol Gossip" which is excellent.
https://www.amazon.com/Legends-Live-Gerry-Mulligan-Sextet/dp/B0064UJTAW/ref=sr_1_4?crid=19E0S9EK90BMU&dib=eyJ2IjoiMSJ9.dwfh9hg7a7DPRP4ifA-MCVdFF9S3PpKxSDaBagoEaOA-8PFWkXZRcKr9fjKJbtX9E5-XqB_8p7SXMrZ4yzTNe5DMICDKRdQQOm7SIfLtBonYkzwAPS7vURDw4YtFkGWWewRryvWTPDnmL0QlSr4mh6IcfZlo11sgJy1DKzAcJ6d_O8XPpMgB0SkZBL5Wxjzn6cechNZ2yN08nFPrt8UZMg.4VECiT__nRILq43gwjGpf_hDW1tsBojr8uVfmvNKl7E&dib_tag=se&keywords=gerry+mulligan+sextet&qid=1744735543&refinements=p_n_binding_browse-bin%3A387645011&rnid=387643011&s=music&sprefix=gerry+mulligan+sextet%2Caps%2C392&sr=1-4
It's from this album, which has been commercially available for a while. They also did a studio album called "Idol Gossip" which is excellent.
https://www.amazon.com/Legends-Live-Gerry-Mulligan-Sextet/dp/B0064UJTAW/ref=sr_1_4?crid=19E0S9EK90BMU&dib=eyJ2IjoiMSJ9.dwfh9hg7a7DPRP4ifA-MCVdFF9S3PpKxSDaBagoEaOA-8PFWkXZRcKr9fjKJbtX9E5-XqB_8p7SXMrZ4yzTNe5DMICDKRdQQOm7SIfLtBonYkzwAPS7vURDw4YtFkGWWewRryvWTPDnmL0QlSr4mh6IcfZlo11sgJy1DKzAcJ6d_O8XPpMgB0SkZBL5Wxjzn6cechNZ2yN08nFPrt8UZMg.4VECiT__nRILq43gwjGpf_hDW1tsBojr8uVfmvNKl7E&dib_tag=se&keywords=gerry+mulligan+sextet&qid=1744735543&refinements=p_n_binding_browse-bin%3A387645011&rnid=387643011&s=music&sprefix=gerry+mulligan+sextet%2Caps%2C392&sr=1-4