The ornamental design for a gas bottlesupportleg, as shown and described.
FIG. 1 is a top, right, front perspective view of a gas bottle support leg of the present design;
FIG. 2 is a bottom plan view of the gas bottle support leg shown in FIG. 1;
FIG. 3 is a front elevational view of the gas bottle support leg shown in FIG. 1;
FIG. 4 is a left side elevational view of the gas bottle support leg shown in FIG. 1;
FIG. 5 is a top, left, rear perspective view of the gas bottle support leg shown in FIG. 1;
FIG. 6 is a right side elevational view of the gas bottle support leg shown in fig. 1;
FIG. 7 is a top plan view of the gas bottle support leg shown in FIG. 1; and,
FIG. 8 is a top and rear perspective view of the gas bottle support leg of FIG. 1 shown in a position of use attached to and supporting a gas bottle with two gas bottle support legs that are not included in the claim.
The broken lines in FIG. 8 depict environmental subject matter that is not part of the claimed design and is included to show the gas bottle support leg in use.