Idea of Gym Icon
This icon is made up of three separate groupings, one of top of the other is a vertical manner. The first component of the icon, at the top, is straight line with small, rounded corner, vertical rectangles near both ends of the line. The second component is the same as first, but the middle, between the two vertical rectangles, is a jagged line, representing an "ez" barbell. The third component, like the others, is the same, except the middle. The middle has an oval with two vertical lines centered in the oval.
This page shows the different variations of the Gym from an Icons8 icon pack. Feel free to resize and recolor the icon, and then download the icon in PNG format for free.