Hi Sasa,
You can build it with GB container block and headline block, and some CSS:
https://www.screencast.com/t/z2U76Lcuv
1. Add a headline block inside the container block.
2. Set the headline block to inline width, add background color to it.
3. Set padding around it, and negative margin top/left to position it.
4. Add an additional CSS class to the headline block, eg. custom-title
.
5. Add this CSS based on the additional CSS class:
.gb-headline.custom-title:before {
content: " ";
display: block;
position: absolute;
left: -18px;
bottom: -7px;
border-color: rgba(0,0,0,0) #599396 rgba(0,0,0,0) rgba(0,0,0,0);
border-style: inset solid inset inset;
border-width: 0 19px 7px;
}
.gb-headline.custom-title {
position: relative;
}